Over the ages, my eyes are not healthy as I was younger, and now my viewfinder is getting much more blurry. I've adjusted it to adjustment limit. And, it is hard to use my eye glasses, especially when ...

I have a fairly new Nikon D7000 (I've taken about 2000 pictures).
Something happened during my last trip, where thew viewfinder never gets sharp anymore. It always looks out of focus, regardless if ...

The viewfinder on my camera has diopter correction, but is there a "correct" way to set it up? In the past I've just allowed the camera to auto-focus on a distant point, and then make sure that is as ...